Johnson Controls LSWU User Manual

JOHNSON CONTROLS
98
FORM 145.05-NOM7
ISSUE DATE: 10/31/2019
SECTION 4 – MAINTENANCE
DETERMINING WATER FLOW
(CONDENSER ONLY)
1. Check that the condenser valve is 100% open and
the economizer is 100% closed.
2. Determine the differential water pressure between
inlet and outlet.
3. Multiply the difference by 2.31(constant).
4. This answer is the feet of W.C. that is owing
through the unit.
5. Refer to Pressure Drop Tables (Table 17 on page
97 and Table 18 on page 97.
6. Locate feet of W.C. from Step 4 in the Condenser
All Models column.
7. Cross to the left of the chart to nd the GPM.
8. The unit requires 2–3 GPM/ton to operate cor-
rectly. See Table 3 on page 11.
9. If the ow is low or high, adjustments should be
made to the pump/water system to correct.
DETERMINING WATER FLOW
(WATERSIDE ECONOMIZER ACTIVE)
1. Check that the condenser valve is 100% open and
the economizer is 100% open.
2. Determine the differential water pressure between
the inlet and outlet.
3. Multiply the difference by 2.31(constant).
4. This answer is the feet of W.C. that is owing
through the unit.
5. Refer to Pressure Drop Tables (Table 17 on page
97 and Table 18 on page 97.
6. Take the Condenser ow feet of W.C. from above
and add the additional from under the Additional
Waterside Economizer - When Active column.
This determines total ow with Condenser and
Economizer valves 100% open.
7. Cross to the left of the chart to nd the GPM.
8. The unit requires 2–3 GPM/ton to operate cor-
rectly. See Table 3 on page 11.
9. If the ow is low or high, adjustments should be
made to the pump/water system to correct.

Johnson Controls LSWU Specifications

General

Brand	Johnson Controls
Model	LSWU
Category	Chiller
Language	English